Apparatus for purifying blast-furnace gases.



MQEJFEILMANN, D. BA GLEY & A. H. SMILTH. APPARATUS FOR PURIFYING BLAST FURNACE GASES.-

I l APPLICATION FILED MAY-1,1914 1,216,677; I I Patented Feb, 20,1917.

UNITED STATES PATENT OFFICE.

MARTIN ERNEST FEILMANN, DONALD BAGLEY, AND ARTHUR :HERBERT SMI'1 H, OF

LONDON,

ENGLAND.

APPARATUS FOR PURIFYING BLAST-FURNACE GASES.-

7 Application fileri May 1,

To all whom it may concern:

"Be it known that we, MARTIN ERNEST FEILMANmof 92 Victoria street, Westmin-'- ster, London, S. W., England, and DONALD.

as dust from blast furnace gases or .from

. gases issuing from-other similar types of furnace.

The impurities referred to are objectionable when the gases are used for heating' stoves, firing boilers, or'for heating purposes generally, and particularly when it is desired to utilize-the gases for .the'generation of power in internal combustion engines.

The system claimed by us overcomes the disadvantages inherent in those hitherto used for such gases, as it is perfectly continuous and makes use of revolving filtering bands. Continuous revolvingbands have already been proposed for the removalof dust from air by filtration in conjunction "with I v I pump or fan the dustiis 'continuously' re. dust from the bands, but the novelty-which a vacuum extractor to remove thefiltered we claim consists in the passage .of the bands through the walls-of the casing or flue to the outside, and the application of a vacuum.ex-, tractor to remove the dust outside the casing or flue, whereas in the arrangements hitherto described the textile band circulates entirely inside the casing or flue and the vacuum extractor is therefore necessarily applied.

insidel This is of no consequence in the case of the purification of air, but is highly dis'-' advantageous inIthe' case of a. valuable gas such as blast furnace "gas,. as .it would lead to loss of large quantities of such gas which would be removed by, the vacuum extractor. The novel arrangementwhich we now claim is therefore as follows V In the application ofthe process ,to blast furnace gas, the gases, after passing through a dust extractor of the usual type, which v removes very coarse particles of solid mat-.

ter, are cooled to a suitable .temperature,

which may be that of the outside atmosphere, and are then passedinto a special dust filter. This consists of a casing of metal or Specification of Letters Patent.

Patented Feb. 20, 1917,.

"1914. Serial No. 835,761

- otherjmaterial,through the interior of which bands, which may be'endless, of te'xtile ma- I terial continuously circulate, traveling in" a direction at right angles to thei lengthlof the casing-and so arranged that the-whole of the gas traversing the. casing. isforc'e'd-to pass through the fabric, by which means the gases are. deprived of the dust 'which' they containin suspension.- The movement ofthe fabric 'isjeii'ected b'ymeans of rollers outside the casingor by other-suitable means and it entersand leaves the casingthrough- 'slots so arranged that they are-practically I I gas-tight. The-gas may be...passe'd through any number of successive layersof'm'oving fabric aceording-tothe amount and character of the dust and the-degree of purification desired. 1 The interior of the casing is provided with means for imparting heatlto the fabricso' that it is retained in a dry condition. The dust which is continuously]. re-

moved to the outside .of thebas'i'ng-by'th moving fabric is there'remove'd continuously from the fabri'cby' means of. the vacuum extractors. Each of these consists of ametal casing provided with a slot which is pressed" against the wholewidth, of the band-of fabme. By means'of a constant vacnum inainvtained within thisicasingwiththe aid of a 'moved and passed into a suitable receptacle,

[Before the fabric is submitted to the action of the vacuum any magnetic dust particles may be separately removed bylfimeans'of' a magnetic separator so. placed that it acts on -the' dust within the fabric ..before it'passes cooled by an indirect cooler of the tubular v kind. Motion is, or may be, imparted to the "gases by any suitable form of exhauster or blower at anyconvenient stage of .the

process. a r

v The attached gases pass from the ordinary .dustextractor I d ing shows 'one method of carrying out the: said .invention- The and coolers into the casing B' at A,'

moving .in' -ithe-dijrec'tion of the arrows. They then pass forward and the dust which they contain is-filtered out by the band of textile material C, vvhich travelsin the direction of the arrows and is actuated by the rollers G. The gases pass out of the apparatus at I-I to the cooler and storage holder. The magnetic separators are indicated diagrammatically at M and the vacuumextractors at V K indicates the position of heating pipes for maintaining the textile fabric in a dry condition and these pipes may be heated by a diverted current of hot furnace gas or in anyother suitable manner.

We claim 1. In an apparatus for purifying blast furnace gas or other similar gases, the combination of a closed casing having inlet and outlet openings for the gases passing to and from said casing, traveling bands or tapes moving Within the casing for collecting dust or other matter from said gases, and means cooperating with the bands outside the casing for removing such collected matter.

2. In an apparatus for purifying blast furnace gas or other similar gases, the combination of a closed casing having inlet and outlet openings for the gases passing to and side the casing from. said casing, traveling bands or tapes entering. said casing through slots in the side thereof, said bands or tapes moving vvithin the. caSing in a direction approximately at right angles to the-flow of gases passing through said casing, and means outfor removing the dust or other matter collected. the bands.

3. In an apparatus for purifying blast furnace gas of'other' similar gases, the combination of a closed casing having inlet and outlet openings for the gases passing to and from said casing, traveling'bands or tapes entering said casing through slots in the side thereof,'s'aid bands or tapes moving Within the casing in. a direction approxi mately at right angles to the flow of gases passing through said casing, and a vacuum extractor located outside the casing and cooperating With the bands for removing the dust collected thereby.

4. In an apparatus for purifying blast furnace gas or other similar gases, the comblnation of a closed caslng having lnlet and outlet openings for the gases passing to and from said casing, traveling bands or tapes entering said casing through slots in the side thereof, saidbands or tapes moving Within the casing in a direction approximately at right angles to the flow of gases passing through said casing, a vacuum extractor located outside the casing and cooperating With the bands for removing the dust collected thereby, and a magnetic-separator for extracting metallic particles from the collecting bands prior to the operation of the vacuum apparatus.

5. In an apparatus for purifying blast tion at right angles to the direction of flows of the gases through the casing, rollers or pulleys journaled outside the said casing over which the bands are adapted to travel for actuating the same, and means for removing the dust or other matter collected by said bands. I

6.'In an apparatus for purifying blast furnace gas or other similar gases, the combination of a closed casing-having inlet and outlet openings for the gases passing to and from said casing, traveling bands or tapes of textile material moving Within the casing, in a direction at right angles to the direction of flow of the gases through said casing, heating devices Within said casing for maintaining the textile hands in a dry condition, and means for removing the dust or other matter collected by said bands.

Dated this eighteenth day of April, 1914.

. MARTIN ERNEST FEILMANN.

D. BAGLEY. ARTHUR HERBERT SMITH. WVitnesses:

H. J. RowBo'r'roM, I E. M. REEVES. 

